When i had to verify my Skrill account, They withdrew a small amount from it.
Then i had to write that exact amount to verify my account, Their terms are pretty vague and from what i can determine they will require more validation once you have withdrawn a certain amount to your bank account.
They have been very reliable in my case (Can only complain about their high fees), Last time it only took 3 days to transfer them from Clixsense to my bank (I was quite surprised actually).
You can also make use of Clixsense's new payment system through Transferwise, Give Clixsense your IBAN from your bank and Clixsense will use their TW account to transfer them to your bank-account.
That's what i'm going to do